Beam shaping by nonlinear moiré metasurfaces
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866917699699867648 |
|---|---|
| author | Qu, Lun Wu, Wei Zhang, Di Wang, Chenxiong Bai, Lu Li, Chenyang Cai, Wei Ren, Mengxin Alù, Andrea Xu, Jingjun |
| author_facet | Qu, Lun Wu, Wei Zhang, Di Wang, Chenxiong Bai, Lu Li, Chenyang Cai, Wei Ren, Mengxin Alù, Andrea Xu, Jingjun |
| contents | This paper explores the interplay of momentum transfer and nonlinear optical processes through moiré phenomena. Momentum transfer plays a crucial role in the interaction between photons and matter. Here, we study stacked metasurfaces with tailored dispersion and rotated against each other with varying twisted angles. The stacking introduces interlayer interactions, which can be controlled by the relative angle between metasurfaces, significantly enriching the resulting response compared to the single layer counterpart. By focusing on second-harmonic generation (SHG) from these twisted metasurfaces, we delve into the realm of nonlinear moiré photonics. Through experimental observations, we unveil the emergence of intricate far-field SHG radiation patterns, showing their effective tuning by varying the twisted angles. These findings offer a fresh perspective to explore nonlinear wavefront shaping through moiré phenomena, opening new avenues for nonlinear information processing, optical steering, and nonlinear optical switching. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_14133 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Beam shaping by nonlinear moiré metasurfaces Qu, Lun Wu, Wei Zhang, Di Wang, Chenxiong Bai, Lu Li, Chenyang Cai, Wei Ren, Mengxin Alù, Andrea Xu, Jingjun Optics This paper explores the interplay of momentum transfer and nonlinear optical processes through moiré phenomena. Momentum transfer plays a crucial role in the interaction between photons and matter. Here, we study stacked metasurfaces with tailored dispersion and rotated against each other with varying twisted angles. The stacking introduces interlayer interactions, which can be controlled by the relative angle between metasurfaces, significantly enriching the resulting response compared to the single layer counterpart. By focusing on second-harmonic generation (SHG) from these twisted metasurfaces, we delve into the realm of nonlinear moiré photonics. Through experimental observations, we unveil the emergence of intricate far-field SHG radiation patterns, showing their effective tuning by varying the twisted angles. These findings offer a fresh perspective to explore nonlinear wavefront shaping through moiré phenomena, opening new avenues for nonlinear information processing, optical steering, and nonlinear optical switching. |
| title | Beam shaping by nonlinear moiré metasurfaces |
| topic | Optics |
| url | https://arxiv.org/abs/2406.14133 |